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144 lines
4.5 KiB
144 lines
4.5 KiB
<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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namespace Think\Cache\Driver;
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use Think\Cache;
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defined('THINK_PATH') or exit();
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/**
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* Memcache缓存驱动
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* @category Extend
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* @package Extend
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* @subpackage Driver.Cache
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* @author liu21st <liu21st@gmail.com>
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*/
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class Memcachesae extends Cache {
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/**
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* 架构函数
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* @param array $options 缓存参数
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* @access public
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*/
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function __construct($options=array()) {
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$options = array_merge(array (
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'host' => C('MEMCACHE_HOST') ? : '127.0.0.1',
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'port' => C('MEMCACHE_PORT') ? : 11211,
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'timeout' => C('DATA_CACHE_TIMEOUT') ? : false,
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'persistent' => false,
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),$options);
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$this->options = $options;
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$this->options['expire'] = isset($options['expire'])? $options['expire'] : C('DATA_CACHE_TIME');
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$this->options['prefix'] = isset($options['prefix'])? $options['prefix'] : C('DATA_CACHE_PREFIX');
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$this->options['length'] = isset($options['length'])? $options['length'] : 0;
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$this->handler = memcache_init();//[sae] 下实例化
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//[sae] 下不用链接
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$this->connected=true;
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}
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/**
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* 是否连接
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* @access private
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* @return boolean
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*/
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private function isConnected() {
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return $this->connected;
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}
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/**
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* 读取缓存
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* @access public
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* @param string $name 缓存变量名
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* @return mixed
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*/
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public function get($name) {
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N('cache_read',1);
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return $this->handler->get($_SERVER['HTTP_APPVERSION'].'/'.$this->options['prefix'].$name);
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}
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/**
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* 写入缓存
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* @access public
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* @param string $name 缓存变量名
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* @param mixed $value 存储数据
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* @param integer $expire 有效时间（秒）
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* @return boolean
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*/
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public function set($name, $value, $expire = null) {
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N('cache_write',1);
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if(is_null($expire)) {
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$expire = $this->options['expire'];
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}
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$name = $this->options['prefix'].$name;
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if($this->handler->set($_SERVER['HTTP_APPVERSION'].'/'.$name, $value, 0, $expire)) {
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if($this->options['length']>0) {
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// 记录缓存队列
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$this->queue($name);
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}
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return true;
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}
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return false;
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}
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/**
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* 删除缓存
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* @access public
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* @param string $name 缓存变量名
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* @return boolean
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*/
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public function rm($name, $ttl = false) {
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$name = $_SERVER['HTTP_APPVERSION'].'/'.$this->options['prefix'].$name;
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return $ttl === false ?
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$this->handler->delete($name) :
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$this->handler->delete($name, $ttl);
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}
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/**
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* 清除缓存
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* @access public
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* @return boolean
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*/
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public function clear() {
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return $this->handler->flush();
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}
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/**
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* 队列缓存
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* @access protected
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* @param string $key 队列名
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* @return mixed
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*/
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//[sae] 下重写queque队列缓存方法
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protected function queue($key) {
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$queue_name=isset($this->options['queue_name'])?$this->options['queue_name']:'think_queue';
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$value = F($queue_name);
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if(!$value) {
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$value = array();
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}
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// 进列
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if(false===array_search($key, $value)) array_push($value,$key);
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if(count($value) > $this->options['length']) {
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// 出列
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$key = array_shift($value);
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// 删除缓存
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$this->rm($key);
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if (APP_DEBUG) {
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//调试模式下记录出队次数
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$counter = Think::instance('SaeCounter');
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if ($counter->exists($queue_name.'_out_times'))
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$counter->incr($queue_name.'_out_times');
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else
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$counter->create($queue_name.'_out_times', 1);
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}
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}
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return F($queue_name,$value);
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}
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}
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